The word unappetising is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 23
Highest Scoring Words With Friends™ Plays In The Letters unappetising
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Seven Letter Word Alert: (59 words)
antigen, asinine, augites, aunties, ensuing, gentian, guanine, guineas, guppies, ignites, nappies, napping, nesting, nipping, paining, panties, panting, pasteup, pasting, patines, pausing, peanuts, penguin, petnaps, petunia, pianist, pigpens, pinenut, pinesap, pinnate, pungent, puniest, punting, pupates, sapping, seating, sinuate, sipping, sniping, snippet, spinnet, spiting, stuping, suiting, supping, tapings, tapping, teasing, tenpins, tensing, tiepins, tipping, tunings, unities, uniting, unspent, unstage, unstain, upstage